Level density of the sd-nuclei—Statistical shell-model predictions

Journal Article · Thu Mar 15 04:00:00 EDT 2018 · Atomic Data and Nuclear Data Tables

DOI:https://doi.org/10.1016/J.ADT.2017.08.001· OSTI ID:22852430

Senkov, R. A. ^[1]; Zelevinsky, V. ^[2]

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1. Natural Sciences Department, La Guardia Community College, Long Island City, NY 11101 (United States)
2. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824-1321 (United States)

Accurate knowledge of the nuclear level density is important both from a theoretical viewpoint as a powerful instrument for studying nuclear structure and for numerous applications. For example, astrophysical reactions responsible for the nucleosynthesis in the universe can be understood only if we know the nuclear level density. We use the configuration-interaction nuclear shell model to predict nuclear level density for all nuclei in the sd-shell, both total and for individual spins (only with positive parity). To avoid the diagonalization in large model spaces we use the moments method based on statistical properties of nuclear many-body systems. In the cases where the diagonalization is possible, the results of the moments method practically coincide with those from the shell-model calculations. Using the computed level densities, we fit the parameters of the Constant Temperature phenomenological model, which can be used by practitioners in their studies of nuclear reactions at excitation energies appropriate for the sd-shell nuclei.

• OSTI ID: 22852430
• Journal Information: Atomic Data and Nuclear Data Tables, Journal Name: Atomic Data and Nuclear Data Tables Vol. 120; ISSN ADNDAT; ISSN 0092-640X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTRONOMY AND ASTROPHYSICS
ASTROPHYSICS
ENERGY-LEVEL DENSITY
EXCITATION
MANY-BODY PROBLEM
MOMENTS METHOD
NUCLEAR REACTIONS
NUCLEAR STRUCTURE
NUCLEOSYNTHESIS
SHELL MODELS
UNIVERSE